Ubuntu USN · USN-8379-1

urllib3 vulnerabilities

Published: Wed, 03 Jun 2026 13:50

CVE-2026-44431CVE-2026-44432

Summary

Several security issues were fixed in urllib3.

Details

It was discovered that urllib3 incorrectly handled cross-origin redirects in ProxyManager. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2026-44431) It was discovered that urllib3 incorrectly handled decompression of specially crafted responses. A remote attacker could possibly use this issue to cause urllib3 to consume resources, leading to a denial of service. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-44432)

Recommended actions per Ubuntu release

StackPatch playbook auto-generated per release codename and per affected package.

Ubuntu jammy

python-urllib3→1.26.5-1~exp1ubuntu0.7apt_upgrade
Standard apt upgrade. Install 1.26.5-1~exp1ubuntu0.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python-urllib3
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-urllib3→1.26.5-1~exp1ubuntu0.7apt_upgrade
Standard apt upgrade. Install 1.26.5-1~exp1ubuntu0.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-urllib3
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu noble

python-urllib3→2.0.7-1ubuntu0.7apt_upgrade
Standard apt upgrade. Install 2.0.7-1ubuntu0.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python-urllib3
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-urllib3→2.0.7-1ubuntu0.7apt_upgrade
Standard apt upgrade. Install 2.0.7-1ubuntu0.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-urllib3
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu questing

python-urllib3→2.3.0-3ubuntu0.6apt_upgrade
Standard apt upgrade. Install 2.3.0-3ubuntu0.6 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python-urllib3
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-urllib3→2.3.0-3ubuntu0.6apt_upgrade
Standard apt upgrade. Install 2.3.0-3ubuntu0.6 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-urllib3
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu resolute

python-urllib3→2.6.3-1ubuntu1.1apt_upgrade
Standard apt upgrade. Install 2.6.3-1ubuntu1.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python-urllib3
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-urllib3→2.6.3-1ubuntu1.1apt_upgrade
Standard apt upgrade. Install 2.6.3-1ubuntu1.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-urllib3
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

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